stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Unit 7: The Mole and Stoichiometry Flashcards | StudBud
Explore
/
Unit 7: The Mole and Stoichiometry
Unit 7: The Mole and Stoichiometry
12 terms
·
StudBud Administration
·
172 plays
The Mole and Stoichiometry basic concepts and calculations quiz!
Flashcards
12 cards
F
Practice quiz
P
Host live
L
Questions
12
Answers
1
Excess or Limiting?
limiting reagent
excess reagent
2
How many grams of carbon dioxide are there in a container with a volume of 4.50L at STP?
0.483g CO2
4.00g CO2
8.51g CO2
2.41g CO2
3
The calculations of quantities in chemical reactions is a subject of chemistry called......
thermochemistry
chemistry
electrochemistry
stoichiometry
4
_____ ______ is used to convert between the # of moles of gas and the volume of gas at STP.
molar ratio
chemical formula
molar volume
density
5
How many atoms are in 0.652 mol of iron?
3.93 x 10^23 atoms Fe
6.02 x 10^23
0.652 x 10^24 atoms Fe
5.022 atoms Fe
6
A compound is found to contain 23.3% Mg, 30.7% S and 46.0% O. What is the empirical formula?
SO3
SOMg3
MgSO3
NO2
7
Avogadro's number is......
6.02 x 10^24
6.02 x 10^23
5.08 x 10^24
2.44 x 10^23
8
A sample contains 27.1g of calcium oxide. How many moles of calcium oxide are in the sample?
56.08 mol CaO
1.726 mol CaO
27.1 mol CaO
0.483 mol CaO
9
In an experiment, 3.25g of NH3 are allowed to react with 3.50g of O2. What is the lim.reagent?
NH
O2
H20
10
A formula with the lowest whole-number ratio of elements in a compound is known as the?
empirical formula
formula formula
chemical formula
molecular formula
11
The relative amounts of the elements in a compound are expressed as ....
compound composition
empirical formula
percent composition
12
Calculate the percent composition for the compund listed: C2H5OH
C)24.02% H) 6.048% O) 34.73%
C) 52.14% H) 13.13% O) 34.73%
